Diversion fitting for hot-water heating systems



S. J. FOLLO Oct. 25, 1949.

DIVERSION-FITTING FOR HOT-WATER HEATING SYSTEMS Filed Oct. 10, 1946 l IIIIW "lmlill'll A W W M W.

5 nnunuunnn latented Oct. 25, 1949 DIVERSION FITTING FOR HOT-WATER HEATING SYSTEMS Salvatore J. Follo, East Haven, Conn., assignor to The Mel Products Company, a corporation of Connecticut Application October 10, 1946, Serial No. 702,448

1 Claim.

The present invention relates to improvements in fittings for hot-water heating systems and relates more particularly to diversion-fittings for one-pipe hot-Water heating systems, i. e., hotwater heating systems employing a single main pipe or duct to both supply hot water to radiators and to return the cooled water to the heater.

One of the main objects of the present invention is to provide a single unitary diversionfitting which may serve to conduct a main stream of hot water or the like, and at the same time serve to divert a portion of such main stream to a radiator and to return the diverted Water back into the said main stream.

Another object of the present invention is to provide a simple, reliable and effective fitting of the character referred to which may be produced at a low cost for manufacture.

A further object of the present invention is to provide a superior diversion-fitting for heating systems of the character described having a construction and arrangement whereby the fitting will perform its function regardless of which end is connected to the inlet portion of a main.

With the above and other objects in view, as will appear to those skilled in the art from the present disclosure, this invention includes all features in the said disclosure which are novel over the prior art.

In the accompanying drawings, in which certain modes of carrying out the present invention are shown for illustrative purposes:

Fig. 1 is a schematic elevational view of a onepipe hot-water heating system in which is included a plurality of fittings embodying the present invention; and

Fig. 2 is a broken view on an enlarged scale of the area 2 of Fig. 1, with the fittings shown in central-longitudinal section and the pipes or ducts in elevation.

For the purpose of making clear a typical use of the present invention, there is shown in Fig. 1 a one-pipe hot-water heating system which includes radiators III, II and I2 respectively located at different elevations with respect to a mainpipe I3.

For purposes of illustration, the radiator I0 may be viewed as being located on the second floor of a building, the radiator I I may be viewed as being located upon the main floor or first floor of such a building while the radiator I2 may be viewed as being located in the basement or cellar.

Interposed in the main-pipe I3 are three (more or less) corresponding diversion-fittings each generally designated by the reference character I4 with the added superscript a, b and 0.

Each of the diversion-fittings is formed at its respective opposite ends with internally-threaded main-outlet and main-inlet passages respectively designated by the reference characters I5 and I6. The passages I5 and I5 are interconnected by a main-passage I'I extending lengthwise of the fitting.

Laterally intersecting the main-passage I'I ad jacent the main-outlet passage I5 is a diversionreturn passage I8 which, in the instance shown, is also internally threaded, for purposes as will hereinafter appear.

Also laterally intersecting the main-passage I! but adjacent the main-inlet passage I6 of the fitting, is a diversion-outlet passage I9 also internally threaded, in the instance shown.

Projecting laterally inwardly into the mainpassage I'I adjacent the side of the diversionreturn passage I8 remote from the main-outlet passage I5, is a diverting-lip or -projection 20. The said diverting-lip or -projection is inclined toward the main-outlet passage I5 and partially overlaps the inner end of the diversion-return passage I8.

Also projecting laterally inwardly into the main-passage I! from a point adjacent the side of the diversion-outlet passage I9 remote from the main-inlet passage I B, is a diverting-lip or -projection 2| which is inclined toward the said main-inlet passage I6 in a direction opposite from the inclination of the diverting-lip 20. As shown, the diverting-lip 2| partially overlaps the inner end of the diversion-outlet passage I9.

In the instance shown, the main-pipe I3 is connected at one end into a supply-pipe 22 leading from a heater 23. The opposite end of the main-pipe I3 is connected into a main-return pipe 24 leading to the heater 23 just referred to.

Threaded into the diversion-outlet passage I9 of the diversion-fitting I la is a feed-pipe 25 leading to the radiator I0 and having a controlvalve 26 interposed therein. Connecting the opposite end of the radiator II] to the diversionreturn passage I8 of the diversion-fitting I 4a is a return-pipe 21.

Threaded into the diversion-outlet passage I9 of the diversion-fitting I4b is a feed-pipe 28 leading to the radiator II and having a control-valve 29 interposed therein. The opposite end of the radiator II is connected by means of a returnpipe 30 to the diversion-return passage I8 of the said fitting Mb.

In a manner similar to the diversion-fittings Ila and [4b, the diversion-fitting Me has threaded into its diversion-outlet passage 19 a feed-pipe 3| which leads downwardly to-the radiator l2 and has interposed therein a control-valve 32. The opposite end of the radiator I2 is connected by means of a return-pipe 33 to the diversionreturn passage I 8 of the diversion-fitting I ic.

Now when hot water or other suitable heating fluid passes from the boiler 23 through the supply-pipe 22, it will enter the adjacent end of the 1 main-pipe l3. Part of the stream will pass :directly through the main-passage H of the diversion-fitting Me, while a portion thereof will be diverted into the feed-pipe 3! by the divertinglip 2| of the diversiomfitting 540. The diverted portion of the stream will thus flow through the radiator I2 and thence through the returnep ipe 33 back into the diversion-return passage 18 of the diversion-fitting Ito, where it will be diverted in the general direction of the main stream by the diverting-lip 20 .of the said .ciiversion-fitting.

The stream of water or the like will new continue through the main-pipe l3 will enter ,the diversion-fitting Mb through the main-inlet passage I 6 thereof, where a portion of the stream will continue directly onwardly through the smellin -passage ll of the said diversion-fitting. A portion .of the stream entering the fitting Ma will, however, be diverted upwardly by the diverting-lip 2.! of the diversion-fitting in question,

into the feed-pipe 28 and will continue onwardly adjacent portion of the main-pipe i3 and will .enter the main-inlet passage is .of the diversionfitting Ma.

Promptly afterv entering the main-inlet passage it of the diversion-fitting Ma, a portion of the stream of hot water will pass directly onwardl-y through the main-passage ll of the said diversion-.-fitting, while a portion thereof will be leliikerted upwardly into the feed-pipe '25 by the diverting-lip 25. After passing through the ra- -.di ator ill, the diverted portion of the stream just referred to will flow through the return-pipe 21 :back into the diversion-return passage is. of the diyersionefltting Ma where (in a slightly cooler pondition it will rejoin the port-ionof thestream going through the main-passage ii and, together therewith, will flow outwardly through the mainvoutlet pas a e 15 of the diversion-fitting Ma.

After leaving the diversion-fittin ta, thestream Ill will flow into the main-pipe l3 and will flow through the main-return pipe 24 back to the heater 23 for being reheated and again passing through the system.

In the manner above described and in accordance with the present invention, a single unitary fitting is provided which serves to conduct a portion of a'main stream of hot water and to both divert and provide for the return of a fractional part of such stream, without requiring complex assemblies of a great number of diverting-elbows or the like.

Instead pf internally threadin the passages I5, i5, i3 and t9, the same may be left smooth for the reception of smooth-ended tubes. Such tubes may be soldered in place in a manner well understood in the art, to provide so-called sweat-joints.

The invention may be carried out in other specific ways than those herein set forth without departing from the spirit and essential characteristics of the invention, and the present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, and Evil ha ges n Within t e mean n d equivalency range of the appended claim are intended to be embraced therein.

I claim:

As anew article of manufacture, an integral one-piece diversion-fitting for one-pipe hot-water heating systems having a main-inlet passage, a main-outlet passage and a main-passage inter.- connecting the same; the said diversion-fitting also having a diversion-outlet passage and a diversion-return passage both laterally intersecting the said main-passage; the diversion-fitting being further provided with two oppositelyslop ing diversion-lips disposed transversely of said main-passage, said lips comprising cylindrical surfaces of revolution formed integrally with one side of said diversion-outlet passage and one side of said diversion-return passage respectively and arranged to project laterally substantially'ha'lfway across-the said main-passage the free ends of said transversely disposed lips being terminated at the intersections of the longitudinal axis of said main-passage -with the longitudinal axes of said diversion-outlet passage and said diversionreturn passage respectively to respectively divert hot water out ofand back intothe-saidmainpassage of the diversion-fitting.

SALVATORE J. EOLLQ.

REFERENCES QGI'I ED The following references are of record in the fi e Q a en m 1e. TED s art PATIENTS Number Name Date 2,224,521 Muller Dec. 10, 1940 2,423,633 Baden July 8, 1947 

